diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index dc3d1c6..42d2702 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -42,7 +42,7 @@ jobs:
         run: pnpm run type-check
 
       - name: Ensure all rules are in the README
-        run: NODE_OPTIONS="--require ts-node/register" pnpm exec markdownlint README.md docs/README.md --config tests/docs/.markdownlint.json --rules tests/docs/README.ts
+        run: NODE_OPTIONS="--require esbuild-runner/register" pnpm exec markdownlint README.md docs/README.md --config tests/docs/.markdownlint.json --rules tests/docs/README.ts
 
       - name: Ensure all rules are documented
         run: |
@@ -61,7 +61,7 @@ jobs:
           fi
 
       - name: Ensure all rules are in the documentation sidebar
-        run: NODE_OPTIONS="--require ts-node/register" pnpm exec markdownlint docs/_sidebar.md --config tests/docs/.markdownlint.json --rules tests/docs/_sidebar.ts
+        run: NODE_OPTIONS="--require esbuild-runner/register" pnpm exec markdownlint docs/_sidebar.md --config tests/docs/.markdownlint.json --rules tests/docs/_sidebar.ts
 
       - name: Copy Documentation README
         run: ./.husky/pre-commit
diff --git a/lib/utils/createValidator.ts b/lib/utils/createValidator.ts
index d9fbc7e..4d5fe38 100644
--- a/lib/utils/createValidator.ts
+++ b/lib/utils/createValidator.ts
@@ -1,8 +1,8 @@
-import { ParsingResult, parse } from './parse';
-import type { JSONSchema4 } from 'json-schema';
-import type { SourceLocation } from 'acorn';
+import { ParsingResult, parse, type SourceLocation } from './parse';
 import type { Rule } from 'eslint';
 
+type JSONSchema4 = Rule.RuleMetaData['schema'];
+
 export type Metadata = {
   comment: {
     loc: SourceLocation;
@@ -60,7 +60,7 @@ interface Options {
   /**
    * JSON Schema to validate attribute options
    */
-  schema?: JSONSchema4 | JSONSchema4[];
+  schema?: JSONSchema4;
 }
 
 interface OptionsRunOnce extends Options {
@@ -293,7 +293,7 @@ export function createValidator({
         }
       }
 
-      return {};
+      return {} as Record<string, never>;
     }
   } satisfies Rule.RuleModule;
 }
diff --git a/lib/utils/parse.ts b/lib/utils/parse.ts
index b6907cf..09e17ea 100644
--- a/lib/utils/parse.ts
+++ b/lib/utils/parse.ts
@@ -1,5 +1,4 @@
 import type { SourceCode } from 'eslint';
-import type { SourceLocation } from 'acorn';
 
 interface Line {
   value: string;
@@ -10,6 +9,21 @@ interface Line {
   invalid: boolean;
 }
 
+// Would import this from acorn, but tsup type resolution is broken
+
+export interface SourceLocation {
+  source?: string | null
+  start: Position
+  end: Position
+}
+
+export interface Position {
+  /** 1-based */
+  line: number
+  /** 0-based */
+  column: number
+}
+
 export interface ParsingResult {
   /**
    * Whether the metadata has ended
diff --git a/package.json b/package.json
index 55605cc..941419c 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
     "@types/semver": "^7.5.6",
     "@typescript-eslint/eslint-plugin": "^6.17.0",
     "@typescript-eslint/parser": "^6.17.0",
-    "acorn": "^8.8.2",
     "esbuild": "^0.19.11",
     "esbuild-runner": "^2.2.2",
     "eslint": "8.56.0",
@@ -40,15 +39,14 @@
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-unicorn": "^50.0.1",
     "husky": "^8.0.3",
+    "json-schema": "^0.4.0",
     "live-server": "^1.2.2",
     "markdownlint": "^0.32.1",
     "markdownlint-cli": "^0.38.0",
     "mocha": "^10.2.0",
     "nyc": "^15.1.0",
     "prettier": "^3.1.1",
-    "prettier-plugin-jsdoc": "^1.3.0",
     "should": "^13.2.3",
-    "ts-node": "^10.9.2",
     "tsup": "^8.0.1",
     "typescript": "^5.3.3"
   },
diff --git a/tsup.config.ts b/tsup.config.ts
index 272a57a..9b6fac4 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -10,5 +10,12 @@ export default defineConfig({
   platform: 'node',
   outDir: 'dist',
   bundle: false,
-  dts: true
+  dts: {
+    entry: [
+      'lib/utils/createValidator.ts',
+      'lib/utils/parse.ts',
+      'lib/index.ts'
+    ],
+    resolve: false
+  }
 });